There are several modes that are being apply for Flexural strengthening of RC beams, the most commonly practised ones include impertinent post-tensioning and the bonding of steel master(prenominal) offices. These methods however suffer from some weighty inherent disadvantages that might include either difficult industry procedures or in some cases lack of durability. An alternative to this in recent years has been is a method which has become wide popular over the recent years and it includes bonding of the FRP plates or sheets for the flexural strengthening of RC beams. As per Meier et al (1993), the first research involving the use of FRPs to the strengthening of structures was carried place in the middle 1980s. Predominantly these researches were carried out to understand the flexural strengthening of RC beams using CFRP plates at the Swiss national Laboratory for materials testing and research.
Methods of strengthening
General
Flexural strengthening of a RC beam is achieved by using FRP composites and is generally done by bonding an FRP plate to the soffit of the beam. The soffit of the beam has to be prepared prior to the application of the FRP plate.
The main reason why adequate surface preparation is considered is to eradicate the weak surface layer of the cover thereby exposing the concrete aggregate so as to improve the bond with the FRP to tin an even surface.
However, a number of variations do exist in the basic procedure. These include pre-stressing of the plate, and the provision of anchorage such as U strips at plate ends to reduce the risk of debonding failures.
* unaccented Soffit Plates: The bonding of unstressed FRP plates to the soffit of RC beams is considered to be the most common method and a lot of theoretical and experimental research in this domain has been done since the inception of this method. The most popular office in which this is done is by doing a wet lay up which gives a greater flexibility for field use. In this method, initially...If you essential to get a full essay, order it on our website: Orderessay
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